Why do thermos flask bottles advertise 24hrs cold and 12hrs hot. Shouldn’t it be the same amount of time for temps in both directions?
In: 1049
Guys – it legit has less to do with the temperature differences and even the design of the thermos discussed above. It is A LOT more related to how ice works and that a “cold” drink presumes there’s ice in it.
It takes a lot of energy to convert solid ice to liquid water, and that’s the magic of ice! If you have a non-insulated cup of ice water sitting at room temperature, it will stay “cold” at a constant temperature of 0°C for quite a while, until that last sliver of ice is gone. After that, it will start warming up pretty quickly. If you start with a glass full of ice, at room temperature, you can realistically expect it to stay “cold” for a good hour or two. And that’s with no insulation!
If you have a non insulated cup of hot water, it stars cooling down instantly, and yes, after a little bit of time, it’s no longer considered “hot”.
So the claim is true, but less so because of the thermos’ amazing insulation and a little more because of….ice.
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